The 930-passenger cruise leaves the port of Miami on December 15, 2017 and makes its final call in London on May 5, 2018. While the soon-to-be-launched cruise isn't the first around-the-world excursion, it is one of the longest. If you can't commit to nearly five months at sea, look into the slightly shorter 120-day cruise, where passengers join the ship in Los Angeles instead of Miami.

Booking starts at $44,999 per person and covers business class air, transfers to and from the ship, a drinks package, and medical services. If you're thinking about embarking on the World Cruise, book soon. Guest who book before May 31 will receive $2,000 in shipboard credit, $750 in spa services credit, and $750 credit for the ship's onboard shop. That's plenty to spend at one of the eight onboard restaurants.

A sister ship to the Viking Star, the Viking Sun will continue the cruise line's industry-changing amenities. Free shore excursions, complimentary Wi-Fi, an infinity pool that extends over the edge of the ship, lectures, and even an onboard cooking school are all available on the Sun. Oh, did we mention the snow grotto with actual snowflakes falling from the ceiling? Millennials aren't the only ones who need to take time off to "find themselves." This sounds like a perfectly acceptable life escape for those a little too mature for Señor Frogs.